/*
* _08LumaQQ - Java _08QQ Client
*
* Copyright (C) 2004 luma <stubma@163.com>
*                    notXX
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
package edu.tsinghua.lumaqq.qq;

import edu.tsinghua.lumaqq.qq.events.IPacketListener;
import edu.tsinghua.lumaqq.qq.events.PacketEvent;
import edu.tsinghua.lumaqq.qq.packets.ErrorPacket;
import edu.tsinghua.lumaqq.qq.packets._08InPacket;

/**
 * 包处理器路由器，一个处理器可以声明处理具有某种包头的包。
 * 一种类型的包可以有多个处理器
 *
 * @author luma
 */
class ProcessorRouter {
    private IPacketListener[] listeners;
    private int count;
    private _08QQClient client;

    public ProcessorRouter(_08QQClient client, int capacity) {
        this.client = client;
        listeners = new IPacketListener[capacity];
        count = 0;
    }

    /**
     * 装载包处理器
     *
     * @param listener
     */
    public void installProcessor(IPacketListener listener) {
        listeners[count++] = listener;
    }

    /**
     * 包到达时，QQClient调用此方法
     *
     * @param event
     */
    public void packetArrived(PacketEvent event) {
        _08InPacket packet = (_08InPacket) event.getSource();
        try {
            for (int i = 0; i < count; i++) {
                if (listeners[i].accept(packet)) {
                    listeners[i].packetArrived(event);
                    return;
                }
            }
        } catch (Throwable e) {
            ErrorPacket error = new ErrorPacket(ErrorPacket.RUNTIME_ERROR, client.getUser());
            error.errorMessage = client.generateCrashReport(e, packet);
            error.setFamily(_08QQ.QQ_PROTOCOL_FAMILY_BASIC);
            error.connectionId = QQPort.MAIN.name;
            client.addIncomingPacket(error, error.connectionId);
        }
    }
}
